摘要
以三峡水利枢纽水平位移监测基准网GPS的应用为例,论述了在特大型水利枢纽工程中GPS监测基准网的作业流程、方案设计、外业观测、数据处理及精度分析等,并提出了几点保障措施来提高GPS观测精度,提出了利用高精度的水准测量成果将GPS基线进行投影,并对投影后的边长进行平差计算得到最终二维坐标的新的GPS数据平差处理方式。该方法的应用,可提高坐标成果精度,对同类测绘工程的实施有一定的借鉴作用。
Taking GPS datum network for horizontal displacement monitoring of TGP as example,we introduce the operation procedure,scheme design,field observation,data processing and accuracy analysis of GPS datum monitoring network in an extra-large hydro project and propose several guarantee measures for improving GPS observation accuracy,for example,GPS baseline projection by high accuracy level measurement data,adjustment calculation for projected side-length to obtain the last 2D GPS data.Its application can improve coordinate accuracy and has reference for similar surveying works.
出处
《人民长江》
北大核心
2010年第20期75-78,共4页
Yangtze River
关键词
GPS
变形监测
基线处理
网平差
GPS
deformation monitoring
baseline treatment
network adjustment
